Extended Data Fig. 8. Case study of a precipitation event starting at 07:50 UTC on 30 June 2021, with a squall line that developed quickly and swept across the Shandong province of China, causing several red warnings.

NowcastNet provides the only sharp and meticulous predictions on the shape and the location of the squall-line-developing system. a, Geographic context for the predictions. b, A single prediction at T + 1 h, T + 2 h and T + 3 h lead times for different models. c, CSI neighbourhood at thresholds 16 mm h⁻¹ and 32 mm h⁻¹. d, PSD at different wavelengths. Images are zoomed in 768 km × 768 km to highlight local details. Precipitation data obtained from the China Meteorological Administration and maps produced with cartopy and Natural Earth.